Pencil-holder



(No Model.)

BLTYRRBLL. PBNGILY'HQLDBR.'

, N0. 290,291. Patented D e. 18,1883.

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EDWARD TYRRELL, or CINCINNATI, oHIo.

PENCIL-HOLDER.

SPECIFICATION lforming part of Letters Patent No. 290,291,dated'December 18, 1883.

Application tiled September 5, 1883. (No model.)

T0 all whom t may concern.:

Be it known that I, EDWARD TYRRELI., a citizen of the United States, anda resident oi? Cincinnati, in the county of. Hamilton and" State ofOhio, have invented certain new and; useful Improvements in PencilHolders, of which the following is a specification.

rlhe object of my invention is to provide a lead-pencil holder which canreadily be adjusted to the use of different-sized leads, and which, atthe same time, is cheap, durable, and convenient, all of which isaccomplished as illustrated in the accompanying drawings.

Figure l is a central4 longitudinal section of my improvement, with theadjusting-nut shown in elevation. Fig. 2 is a similar view with the nutin section. Fig. 3 is a plan of the lead-tube and nut, and Fig. 4E is anenlarged broken section of the lead-tube. Fig. 5 is a longitudinalsection oi the holder-point.

A represents the tube or barrel of the pencil-holder, which ispreferably made of guttapercha. It is shown as made with a solid head.It may be provided with a movable cap.

B represents the removable holder-point, the bore of which is made toconverge, so as to be of smaller diameter at the point and graduallyincreasing in size inwardly.

O represents the adjustable lead-tube. It is adj ustably connected tothe holder by means of screw-threads at its rear, which engage withfemale threads cut in theadj usting-nutD, which nut seats in the bore ofthe holder.

c represents slots cut in the forward end of tube C.

In order to more efiectually hold the lead in the tube when the forksare clamped, I cut a screw-thread upon the interior of the point of thelead-tube C, as shown in Fig. 4. Owing to the elastic character of themetal and the necessity of having the elasticity preserved, theseserrations must be made with a tap-tool which will cut the same in theinterior of the cylinder without materially disturbing the metal. Thesethreads may be cut before the tube is slotted, or afterward, byproviding a suitable outside clamp or ferrule. Ihe s'lotting of the tubeallows the lips or fingers at the forward point to be compressed tograsp and 'hold the lead. By adjusting tube C forward or backward in itsadjusting-nut D, the end of the tube is set in any desired relation tothe converging bore of point B to correspond with the size of lead to beemployed, and when pointB is screwed on the holder the points of tube Care compressed and grasp the lead d and hold it fast for use. The tube Ccan be adjusted to the size of lead by removing the point B of theholder and turning the tube C to lengthen or shorten it, as desired. Thelead is adjusted by simply loosening the point B, whenit is free to slipforward or backward the required distance, when point B is tightened andthe lead is grasped, as before stated. rlhe nut D can be made to fit thebore of tube C and sufficiently tight to be held in place by frictionalone, or it may be feathered, so as to avoid the necessity of removingthe tube and nut for adjustment of the tube C; but I have the nut D madeof two sections, e e', the large section being made of rubber andfitting the bore of the pierced holder and sectionc being lmade of hardrubber forming a joint-nut to prevent the tube C from turning. W'henmade in this manner, the tube C and adj usting-nut are removed from theholder for adjusting the tube to the size of lead.

In Fig. 3 the jointnut is shown as fitting the bore of thepencil-holder, while in Figs. l and 2 the j oint-nut is shown smaller.Thus the modes of construction are equivalent one to the other.

An obvious mode of adjusting tube Cwould be to 'have a removable headwith tube C proj ecting through the nut to be turned from the rear whenthe cap is removed. Such a con# struction is embraced in the rst clauseof claim herein.

I claimv 1. A lead-pencil composed of the holder A, point B, adjustabletube C, and nut D, all arranged and combined substantially as herein setforth.

2. In a lead-pencil, the combination of the holder A, with theextensible tube C and adjusting-nuts c e, substantially'as herein setforth.

3. In a lead-pencil, the combination, with theholder A, of an adjustabletube C, having Ioo extension-cap e, adapted to receive and firmly Intestimony whereof I have hereunto set my Io hold different-sized leadsWithin Iche point l hand. having the converging bore at its point,Substantially as herein Set forth. EDVARD TYRRELL.

4. Inalead-penoil7 the combination of abarl rel, A, adjustable lead-tubeC, provided with \Vitnesses: l Slots c, and having its interior forwardend JNO. E. JONES, screw-threaded, and the sleeve B, all substan- A.'GLUCHOWSKEL t'ially as and for the purpose herein set forth.

